![]() The LIDT for an optic greatly depends on the type of laser you are using. When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. The following is a general overview of how laser induced damage thresholds are measured and how the values may be utilized in determining the appropriateness of an optic for a given application. We also offer laser windows, which have AR coatings centered around commonly used laser wavelengths, and Brewster windows, which are designed to eliminate P-polarized reflected light. For our complete selection, see the Flat Window Selection Guide table to the right. ![]() Thorlabs also offers precision windows fabricated from several other substrates for use in a large variety of laser and industrial applications. Please contact Tech Support to make arrangements for this service. Thorlabs will accept all ZnSe windows back for proper disposal. For the MSDS for ZnSe in English, click here, and for the MSDS in Japanese, click here. For your safety, please follow all proper precautions. This is especially true when working with zinc selenide, as it is a hazardous material. When handling optics, always wear gloves. This substrate scratches easily and should be handled with care. Along with its low absorption in the red portion of the visible spectrum, zinc selenide is ideal for optical systems that combine a 10.6 µm CO 2 laser with a 633 nm HeNe alignment laser. Zinc selenide has a transmission band broader than silicon and germanium. ![]() They are available uncoated for use from 600 nm to 16 µm or with an antireflection (AR) coating on both sides from 1.65 to 3.0 µm, 2.0 to 13.0 µm, 4.5 to 7.5 µm, or 7.0 to 12.0 µm (see the Graphs tab for transmission and reflectance plots). Thorlabs' Precision Zinc Selenide (ZnSe) Windows are offered in Ø1/2" and Ø1" sizes. Uncoated Windows for Visible and IR Applications in the 600 nm - 16 µm Spectral Range.
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